CN102806027B - Multichannel mixing system and liquid on-line hybrid system - Google Patents
Multichannel mixing system and liquid on-line hybrid system Download PDFInfo
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- CN102806027B CN102806027B CN201110145467.1A CN201110145467A CN102806027B CN 102806027 B CN102806027 B CN 102806027B CN 201110145467 A CN201110145467 A CN 201110145467A CN 102806027 B CN102806027 B CN 102806027B
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Abstract
The invention discloses a kind of multichannel mixing system and liquid on-line hybrid system, there is multiple pretreatment flow container, wherein store various liquid to be mixed; Arbitrary pretreatment flow container connects a feed pump uniquely through pipeline, and feed delivery side of pump is connected to blending tank through fluid pipeline; Blending tank place arranges one first LOAD CELLS, and weighing-up wave is connected to liquid mixture control; Described liquid mixture control is electrically connected the mixing actuation means of each feed pump and blending tank.Measure owing to have employed the quality of LOAD CELLS to the liquid entered in blending tank, measuring accuracy can be greatly improved, far away higher than the control accuracy adopting flowmeter.Meanwhile, owing to adopting weight metering mode, the proportion that liquid is caused due to variations in temperature changes the precision that can not affect metering.
Description
Technical field
The present invention relates to liquid mixed technique, particularly one can realize high accuracy, large discharge multichannel mixing system and liquid on-line hybrid system, to realize the mixing of online, high-precision liquid.
Background technology
The online liquid mixing related in industrial production, generally adopts flowmeter to measure (also can adopt measuring pump) the liquid participating in mixing.See Fig. 1, in the mixture operation process of reality, mixed various raw material liqs are stored among pretreatment flow container 1.When starting to mix, feed pump 2 takes out liquid to be mixed from pretreatment flow container 1, and delivers in blending tank 4 through piping.Under the promotion of feed pump 2, liquid to be mixed is first measured by flowmeter 3, flow signal is passed to frequency converter 5 by flowmeter 3, this flow signal and the flow parameter set in advance compare by frequency converter 5, and exporting control signal to adjust feed pump 2 rotating speed according to the result compared, the amount of liquid to be mixed making it carry reaches required flow.In fact, feed pump 2, flowmeter 3 and frequency converter 5 constitute the automatic control system of a closed loop, and its target controlled is: make the flow flowing through flowmeter 3 liquid to be mixed through feed pump 2 reach flow needed for setting in advance.
But, known based on Theory of Automatic Control: the automatic control system of any closed loop is in the starting stage of operation, and it always exists larger error with the predetermined control objectives that will reach, and the elimination of this error has to pass through a settling time.
See Fig. 2, wherein shown: the closed loop liquid flow control system that above-mentioned feed pump 2, flowmeter 3 and frequency converter 5 are formed initially reaches the stable transient process of fluid flow from startup.Obviously, in quite a while after system start-up, flow through feed pump 2, the precision of flowmeter 3 liquid to be mixed is can not be guaranteed, this makes the mode controlling liquid mixing based on flowmeter can only obtain lower mixed-precision, usually only has the precision of a few percent.
On the other hand, because the proportion of liquid to be mixed can change with the change of temperature, measure liquid to be mixed in the mode of flow, inevitable because of liquid to be mixed, proportion is different and occur certain error at different temperature.Have again and be exactly: when the capacity difference of the liquid various to be mixed in filling a prescription is larger, be difficult to reach high-precision on-line mixing.Such as: the M liquid of 1000 liters and the N liquid of 100 milliliters are mixed, because the amount difference between M liquid and N liquid is up to 10000 times, if use traffic meter carries out the mode of measuring, the amount of liquid of 100 milliliters is even likely left in the basket and disregards, therefore, with regard to above-mentioned example, be difficult to the precision ensureing these two kinds of liquid on-line mixing.
To sum up, it is comparatively large obviously to there is error to the technical scheme that the liquid participating in mixing measures in existing employing flowmeter, is unsuitable for the liquid on-line mixing that required precision is higher.
Summary of the invention
One aspect of the present invention is to provide a kind of multichannel mixing system, it realizes the liquid mixing of multichannel based on the mode of weighing, make the metering not proportion of liquid body and the impact of flowmeter error on various liquid to be mixed, realize the mixing of high-precision liquid on-line.
Another aspect of the present invention is to provide a kind of liquid on-line hybrid system, and it is based on above-mentioned multichannel mixing system, and can at random connect or parallel connection, can adapt to various production-scale high-precision liquid on-line mixing.
One aspect of the present invention adopts following scheme to realize:
A kind of multichannel mixing system, has multiple pretreatment flow container, wherein stores various liquid to be mixed; Arbitrary pretreatment flow container connects a feed pump uniquely through pipeline, and feed delivery side of pump is connected to blending tank through fluid pipeline; Blending tank place arranges one first LOAD CELLS, and weighing-up wave is connected to liquid mixture control; Liquid mixture control is electrically connected the mixing actuation means of each feed pump and blending tank.
Measure entering the quality of liquid in blending tank owing to have employed LOAD CELLS, avoid in prior art the comparatively big error generally adopting the metering method of flowmeter to bring, measuring accuracy can be greatly improved, and its precision depends on the measurement resolving accuracy for LOAD CELLS.Meanwhile, owing to adopting weight metering mode, the proportion that liquid is caused due to variations in temperature changes the precision that can not affect metering.
Another aspect of the present invention adopts following scheme to realize:
A kind of liquid on-line hybrid system, at least comprises more than one prime mixed cell and more than one secondary mixed cell; Prime mixed cell and secondary mixed cell are made up of multichannel mixing system respectively;
Multichannel mixing system has multiple pretreatment flow container, wherein stores various liquid to be mixed; Arbitrary pretreatment flow container connects a feed pump uniquely through pipeline, and feed delivery side of pump is connected to blending tank through fluid pipeline; Blending tank place arranges one first LOAD CELLS, and weighing-up wave is connected to liquid mixture control; Liquid mixture control is electrically connected the mixing actuation means of each feed pump and blending tank;
The blending tank of arbitrary prime mixed cell is connected to a buffer-stored tank through an inter-stage feed pump, and the pretreatment flow container of this buffer-stored tank and a level mixed cell is set to one.
Due to prime mixed cell, secondary units are carried out connecting and/or being arranged in parallel, the liquid of prime is mixed and mixes each other independently with secondary liquid, be independent of each other.In addition, because any amount of prime mixed cell can adopt above-mentioned embodiment at the same level in parallel, to make in secondary mixed cell the quantity delivered of the liquid to be mixed in corresponding buffer-stored tank to be guaranteed, and then ensure on-line uninterruption production under the prerequisite that whole liquid on-line hybrid system mix in high accuracy.Make this liquid on-line hybrid system can be applicable to various production-scale requirement.
Accompanying drawing explanation
Fig. 1 is existing mixing system schematic diagram;
Fig. 2 is the schematic diagram of existing fluid flow closed-loop control system transient process;
Fig. 3 is the schematic diagram of a mixing system of the present invention embodiment;
Fig. 4 is the schematic diagram of another embodiment of mixing system of the present invention.
Fig. 5 is the schematic diagram of another embodiment of mixing system of the present invention;
Fig. 6 is the schematic diagram of the unified embodiment of liquid on-line mixed stocker of the present invention.
Fig. 7 is the schematic diagram of another embodiment of liquid on-line hybrid system of the present invention.
Detailed description of the invention
Following examples by reference to the accompanying drawings, are described in further detail technical scheme of the present invention:
See Fig. 3, in a detailed description of the invention of mixing system of the present invention, there is multiple pretreatment flow container 1, wherein store various liquid to be mixed respectively; Arbitrary pretreatment flow container 1 connects a feed pump 2 uniquely through fluid pipeline; The outlet of feed pump 2 is connected to blending tank 4 through fluid pipeline.By means of above-mentioned system, the liquid to be mixed stored in each pretreatment flow container 1 can be transported in blending tank 4 via unique path.
Unlike the prior art: on the pipeline of the present invention between feed pump 2 and blending tank 4, do not arrange any flow detector, but arrange a LOAD CELLS 6 at blending tank 4 place, this LOAD CELLS at least should have the resolution of 1/216.In addition, the weighing-up wave of this LOAD CELLS 6 is connected in a liquid mixture control 7, after this liquid mixture control 7 receives weighing-up wave, the weight parameter of its to be mixed liquid corresponding to the formula being stored in liquid mixture control 7 is in advance compared, when the weight that the reflection of this weighing-up wave is sent to corresponding liquid to be mixed in blending tank 4 reaches the weight parameter value of corresponding liquid to be mixed in formula, then control corresponding feed pump 2 out of service, and when still there being other liquid to be mixed not to be transported to blending tank 4 in aforementioned formula, open corresponding liquid feeding pump to be mixed, continue to carry corresponding liquid to be mixed in blending tank 4, until after in aforementioned formula, all liquid to be mixed is transported to blending tank 4 all in a manner mentioned above, it is out of service that liquid mixture control 7 controls all feed pumps 2, after this, start blending tank 4 all liquid to be mixed be transported in blending tank 4 is mixed.
See Fig. 4, the schematic diagram of its another detailed description of the invention being mixing system of the present invention, wherein, the structure of whole system is substantially identical with aforementioned embodiments with composition, just has additional LOAD CELLS 8 further at each pretreatment flow container 1 place of aforementioned embodiments.The output signal of this LOAD CELLS 8 is connected to liquid mixture control 7, and equally at least should have the resolution of 1/216; Its effect is: the first, and LOAD CELLS 8 can be utilized to monitor the storage of liquid in corresponding pretreatment flow container 1, be beneficial to liquid measure in pretreatment flow container 1 lower time supplement in time; The second, when feed pump 2 injects liquid to be mixed to blending tank 4, the data syn-chronization that LOAD CELLS 8 can be utilized to pass back monitors the discharge of liquid to be mixed, and substitutes the effect of LOAD CELLS 6 in concrete manipulation.
See Fig. 5, in another detailed description of the invention of mixing system of the present invention, set up a constent temperature heater 9 at each pretreatment flow container 1 place further.The object arranging this constent temperature heater 9 guarantees that the temperature of liquid to be mixed in each pretreatment flow container 1 all remains within a stationary temperature scope.The proportion of liquid to be mixed in all pretreatment flow containers 1 so just can be made can not to be subject to the impact of environment temperature change.
The present invention has following advantage with each embodiment above-mentioned:
Measure owing to have employed the quality of LOAD CELLS to the liquid entered in blending tank 4, avoid in prior art the comparatively big error generally adopting the metering method of flowmeter to bring, measuring accuracy can be greatly improved, and its precision depends on the measurement resolving accuracy for LOAD CELLS; Such as: when employing has the digital weighing sensor of 1/216 precision, its range accuracy can reach 60,005 one thousandths, far away higher than the control accuracy of any flowmeter.Meanwhile, owing to adopting weight metering mode, instead of flow measurement mode, the proportion that liquid is caused due to variations in temperature changes the precision that can not affect metering.On this basis, take the measure of constant temperature owing to treating mixing material, make all liquid to be mixed can carry out preparing burden and measuring based on same temperature standard, further ensure that the required precision of mixing.
See Fig. 6, in order to realize aforementioned high-precision liquid on-line mixing, can using the multichannel mixing system in each embodiment above-mentioned as independently prime mixed cell A, and according to corresponding liquid mixture flow journey and amount of liquid to be mixed, by aforementioned each after independently mixed cell A carries out parallel connection, connect with independently secondary mixed cell B further again, namely can form multistage, a high-precision liquid on-line hybrid system.
Specifically, in a basic liquid on-line hybrid system, any one prime mixed cell A can be the multichannel mixing system of arbitrary detailed description of the invention in above-mentioned Fig. 3,4,5, the blending tank 4 of arbitrary prime mixed cell A all connects an inter-stage feed pump 2a, this inter-stage feed pump 2a is controlled by liquid mixture control 7, its effect is the liquid will mixed through prime mixed cell A, be transported in time in buffer-stored tank 21 from blending tank 4, make prime mixed cell A can continue the mixing of next batch.
Above-mentioned secondary mixed cell B, its structure and prime mixed cell A there is no large different, and just namely buffer-stored tank 21 is wherein equivalent to the pretreatment flow container 1 in prime mixed cell A, or both are wholely set.In the multilevel system of reality, just as above-mentioned prime mixed cell A is the same with the relation of secondary mixed cell B, the arbitrary pretreatment flow container in any secondary mixed cell B all can as the buffer-stored tank 21 of prime mixed cell A corresponding thereto.
Substantially identical with the internal structure of prime mixed cell A, multiple buffer-stored tank 21 is provided with in secondary mixed cell B, its effect in secondary mixed cell is the same with the pretreatment flow container 9 in prime mixed cell A, wherein store various is the liquid of mixing material finished product for prime mixed cell A, and this liquid is liquid to be mixed for secondary mixed cell B; Arbitrary buffer-stored tank 21 connects a feed pump 22 uniquely through fluid pipeline, and the outlet of feed pump 22 is connected to blending tank 41 through fluid pipeline.By means of above-mentioned system, the liquid to be mixed stored in each buffer-stored tank 21 can be sent in blending tank 41 via unique path.
The same with prime mixed cell A: secondary mixed cell B of the present invention, on pipeline between feed pump 22 and blending tank 41, do not arrange any flow detector, but arrange a LOAD CELLS 6 at blending tank 41 place, this LOAD CELLS at least should have the resolution of 1/216.In addition, the weighing-up wave of this high-precision LOAD CELLS is connected in a liquid mixture control 71, after this liquid mixture control 71 receives weighing-up wave, the weight parameter of its to be mixed liquid corresponding to the formula stored in advance is compared, when the weight that the reflection of this weighing-up wave is sent to corresponding liquid to be mixed in blending tank 41 reaches the weight parameter value of corresponding liquid to be mixed in formula, then control corresponding feed pump 22 out of service, and when still there being other liquid to be mixed not to be transported to blending tank 41 in aforementioned formula, open corresponding liquid feeding pump to be mixed, continue to carry corresponding liquid to be mixed in blending tank 41, until after in aforementioned formula, all liquid to be mixed is transported to blending tank 41 all in a manner mentioned above, it is out of service that liquid mixture control 71 controls all feed pumps 22, and start blending tank 41 all liquid to be mixed be transported in blending tank 41 is mixed.
The same with the scheme shown in above-mentioned Fig. 4, Fig. 5, each buffer-stored tank 21 place of secondary mixed cell B has additional LOAD CELLS 8 further.The output signal of this LOAD CELLS 8 is connected to liquid mixture control 71, and equally at least should have the resolution of 1/216; Its effect is: the first, and LOAD CELLS 8 can be utilized to monitor the storage of liquid in corresponding each buffer-stored tank 21, be beneficial to liquid measure in each buffer-stored tank 21 lower time supplement in time; The second, when feed pump 2 injects liquid to be mixed to blending tank 4, the data syn-chronization that LOAD CELLS 8 can be utilized to pass back monitors the discharge of liquid to be mixed, and substitutes the effect of LOAD CELLS 6 in concrete manipulation.
The same with prime mixed cell A, a constent temperature heater 9 can also be set up at each buffer-stored tank 21 place.The object arranging this constent temperature heater 9 guarantees that the temperature of liquid to be mixed in each buffer-stored tank 21 all remains within a stationary temperature scope.The proportion of liquid to be mixed in all pre-buffering storage tanks 21 so just can be made can not to be subject to the impact of environment temperature change.
Based on the situation that industry has been familiar with very much, when the liquid of the liquid that some volumes are larger and some small volumes mixes, often need the operation of multistage mixing.Such as: the M liquid of aforementioned 1000 liters and the N liquid of 100 milliliters are mixed, in order to ensure the uniformity mixed, normally first the N liquid of 100 milliliters and less (such as: 500 milliliters) M liquid being carried out first time mixes, make the N liquid of 100 milliliters first spread fully in less (such as: 500 milliliters) M liquid, mix, and then the mixing material being mixed with N liquid and M liquid is mixed with slightly more (such as: 5 liters) M liquid; After this, repeatedly can spread with keeping again, mix, until the N liquid completing whole M liquid of 1000 liters and 100 milliliters fully mixes.
The multistage hybrid system that the present invention's above-mentioned prime mixed cell A and secondary mixed cell B is formed, the mode that mixes can be carried out according to the liquid of the larger liquid of aforementioned volume and small volume, and being set as multistage, concrete progression can calculate as required to be determined.But no matter needing, how many levels are set, the relation between any adjacent two-stage, all can adopt among aforesaid liquid on-line hybrid system, the structural relation of prime mixed cell A and secondary mixed cell B.
Among a liquid on-line hybrid system, no matter the mixed cell of any one-level, be prime mixed cell A or secondary mixed cell B, all can carry out parallel connection among peers.Such as, see Fig. 7, illustrated therein is two kinds of detailed description of the invention in parallel at the same level; The parallel connection of first prime mixed cell A1 and prime mixed cell A2.Namely the liquid that prime mixed cell A1 and prime mixed cell A2 has mixed all is transported to through each self-corresponding feed pump 2a among the same buffer-stored tank 21a of secondary mixed cell B.Two to be prime mixed cell A2 with prime mixed cell A3 in parallel for it.Namely the liquid that prime mixed cell A2 and prime mixed cell A2 has mixed is transported to respectively through each self-corresponding feed pump 2a among the different buffer-stored tank 21a, 21 of secondary mixed cell B.No matter adopt above-mentioned any parallel way, or two kinds of parallel waies adopt simultaneously, can require according to the liquid on-line mixing of reality and determine.
It should be noted that: among a liquid on-line hybrid system, no matter the liquid mixture control 7 in prime mixed cell A or the liquid mixture control 71 in secondary mixed cell B, it both can be arranged independently of each other, also can intensively be wholely set; Such as: be intensively arranged in an industrial control computer; In any case but the connection of corresponding all parts, does not depart from each detailed description of the invention and the relation shown in accompanying drawing 3,4,5 before this in they and each mixed cell.
More than the present invention the embodiment of each liquid on-line hybrid system has following advantage: owing to prime mixed cell, secondary units being carried out connecting and/or being arranged in parallel, the liquid of prime is mixed operate each other independently with secondary liquid mixture operation, be independent of each other.In addition, because any amount of prime mixed cell can adopt in above-mentioned embodiment two kinds of parallel waies at the same level to connect, the quantity delivered of liquid to be mixed in corresponding buffer-stored tank in secondary mixed cell can be guaranteed, and then under ensure that the prerequisite that whole liquid on-line hybrid system mixes in high accuracy, on-line uninterruption is produced.Make this liquid on-line hybrid system can be applicable to various production-scale requirement.
Claims (5)
1. a multichannel mixing system, has multiple pretreatment flow container, wherein stores various liquid to be mixed; It is characterized in that: arbitrary pretreatment flow container connects a feed pump uniquely through pipeline, and feed delivery side of pump is connected to blending tank through fluid pipeline; Described blending tank place arranges one first LOAD CELLS, and weighing-up wave is connected to liquid mixture control; Described liquid mixture control is electrically connected the mixing actuation means of each feed pump and blending tank;
The range resolution of described first LOAD CELLS is less than or equal to 1/2
16;
Described pretreatment flow container is provided with the second LOAD CELLS, and the range resolution of this second LOAD CELLS is less than or equal to 1/2
16; And output signal is connected to liquid mixture control;
Described pretreatment flow container place is provided with a constent temperature heater, remains within a stationary temperature scope in order to make the temperature of liquid to be mixed in pretreatment flow container.
2. a liquid on-line hybrid system, is characterized in that: at least comprise more than one prime mixed cell and more than one secondary mixed cell; Described prime mixed cell and secondary mixed cell are made up of multichannel mixing system respectively;
Described multichannel mixing system has multiple pretreatment flow container, wherein stores various liquid to be mixed; Arbitrary pretreatment flow container connects a feed pump uniquely through pipeline, and feed delivery side of pump is connected to blending tank through fluid pipeline; Described blending tank place arranges one first LOAD CELLS, and weighing-up wave is connected to liquid mixture control; Described liquid mixture control is electrically connected the mixing actuation means of each feed pump and blending tank;
The blending tank of arbitrary prime mixed cell is connected to a buffer-stored tank through an inter-stage feed pump, and the pretreatment flow container of this buffer-stored tank and a level mixed cell is set to one;
The range resolution of described first LOAD CELLS is less than or equal to 1/2
16;
Described pretreatment flow container is provided with the second LOAD CELLS, and the range resolution of this second LOAD CELLS is less than or equal to 1/2
16; And output signal is connected to liquid mixture control;
Described pretreatment flow container place is provided with a constent temperature heater, remains within a stationary temperature scope in order to make the temperature of liquid to be mixed in pretreatment flow container.
3. system according to claim 2, is characterized in that: the blending tank of described multiple prime mixed cell is connected to a buffer-stored tank through an inter-stage feed pump respectively.
4. system according to claim 3, is characterized in that: described buffer-stored tank is provided with the second LOAD CELLS, and the range resolution of this second LOAD CELLS is less than or equal to 1/2
16; And output signal is connected to liquid mixture control.
5. system according to claim 3, is characterized in that: described buffer-stored tank place is provided with a constent temperature heater, remains within a stationary temperature scope in order to make the temperature of liquid to be mixed in buffer-stored tank.
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| JP6367069B2 (en) | 2013-11-25 | 2018-08-01 | 東京エレクトロン株式会社 | Mixing apparatus, substrate processing apparatus, and mixing method |
| CN104258778A (en) * | 2014-09-29 | 2015-01-07 | 江苏鑫丰塑业有限公司 | Plasticizer metering and proportioning device for cable material |
| CN104503496B (en) * | 2014-12-12 | 2017-04-05 | 平顶山华兴浮选工程技术服务有限公司 | A kind of pulp density self-adjusting system and control method |
| CN107441776B (en) * | 2017-09-11 | 2020-02-07 | 武汉华星光电半导体显示技术有限公司 | Defoaming system, defoaming method and display panel |
| CN109782818A (en) * | 2019-02-01 | 2019-05-21 | 凯特兰德有限合伙公司 | Dilute monitoring device and dilution system |
| CN112919320B (en) | 2021-04-02 | 2023-12-26 | 烟台杰瑞石油装备技术有限公司 | Sand conveying equipment, control method and equipment thereof and storage medium |
| CN113464112A (en) | 2021-07-30 | 2021-10-01 | 烟台杰瑞石油装备技术有限公司 | Mix row device, mix row system and fracturing system |
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